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ArCs


Constants of diatomic molecules

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through October, 1976

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 133Cs40Ar
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
D 1           D rarrow X 
Tam, Moe, et al., 1975
Weak emission bands on either side of the forbidden 5d-6s Cs lines at 14499 and 14597 cm-1.
Tam, Moe, et al., 1975
B 2Sigma+ 3           B lrarrow X 2 
Tam, Moe, et al., 1975
A 2Pi3/2 4           A lrarrow X 2 
Hedges, Drummond, et al., 1972; Chen and Phelps, 1973
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 2Pi1/2 5           A lrarrow X 2 
Hedges, Drummond, et al., 1972; Chen and Phelps, 1973
X 2Sigma+Unstable. 2

Notes

1Strong emission at 17800 and weaker bands at 18500 cm-1, just to the red of the forbidden 7s-6s Cs line at 18536 cm-1. 6
2The far-wing emission profiles of the collision-broadened Cs resonance lines at 11178 and 11732 cm-1 have been analyzed Hedges, Drummond, et al., 1972 to give the potential curves for the states X, A, B in the interval 3.5-6 Å; see also the theoretical calculations of Baylis, 1969. Absorption coefficients in the wings of these lines have been measured Chen and Phelps, 1973: barely detectable maxima in the red wings may be due to vibrational structure in the A 2Pi components.
3Unstable. 2
4Weakly bound state, well depth De ~ 300 cm-1. 2
5Weakly bound state, well depth De ~ 200 cm-1. 2
6The bands are believed to arise from transitions between a bound Cs(7ssigma)-Ar excited molecular state and the unstable 6ssigma ground state.

References

Go To: Top, Constants of diatomic molecules, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Tam, Moe, et al., 1975
Tam, A.; Moe, G.; Park, W.; Happer, W., Strong new emission bands in alkali-noble-gas systems, Phys. Rev. Lett., 1975, 35, 85. [all data]

Hedges, Drummond, et al., 1972
Hedges, R.E.M.; Drummond, D.L.; Gallagher, A., Extreme-wing line broadening and Cs-inert-gas potentials, Phys. Rev. A: Gen. Phys., 1972, 6, 1519. [all data]

Chen and Phelps, 1973
Chen, C.L.; Phelps, A.V., Absorption coefficients for the wings of the first two resonance doublets of cesium broadened by argon, Phys. Rev. A: Gen. Phys., 1973, 7, 470. [all data]

Baylis, 1969
Baylis, W.E., Semiempirical, pseudopotential calculation of alkali-noble-gas interatomic potentials, J. Chem. Phys., 1969, 51, 2665. [all data]


Notes

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